/* crypto/asn1/f_string.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include #include "cryptlib.h" #include #include int i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type) { int i, n = 0; static const char *h = "0123456789ABCDEF"; char buf[2]; if (a == NULL) return (0); if (a->length == 0) { if (BIO_write(bp, "0", 1) != 1) goto err; n = 1; } else { for (i = 0; i < a->length; i++) { if ((i != 0) && (i % 35 == 0)) { if (BIO_write(bp, "\\\n", 2) != 2) goto err; n += 2; } buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f]; buf[1] = h[((unsigned char)a->data[i]) & 0x0f]; if (BIO_write(bp, buf, 2) != 2) goto err; n += 2; } } return (n); err: return (-1); } int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size) { int ret = 0; int i, j, k, m, n, again, bufsize; unsigned char *s = NULL, *sp; unsigned char *bufp; int num = 0, slen = 0, first = 1; bufsize = BIO_gets(bp, buf, size); for (;;) { if (bufsize < 1) { if (first) break; else goto err_sl; } first = 0; i = bufsize; if (buf[i - 1] == '\n') buf[--i] = '\0'; if (i == 0) goto err_sl; if (buf[i - 1] == '\r') buf[--i] = '\0'; if (i == 0) goto err_sl; again = (buf[i - 1] == '\\'); for (j = i - 1; j > 0; j--) { #ifndef CHARSET_EBCDIC if (!(((buf[j] >= '0') && (buf[j] <= '9')) || ((buf[j] >= 'a') && (buf[j] <= 'f')) || ((buf[j] >= 'A') && (buf[j] <= 'F')))) #else /* * This #ifdef is not strictly necessary, since the characters * A...F a...f 0...9 are contiguous (yes, even in EBCDIC - but * not the whole alphabet). Nevertheless, isxdigit() is faster. */ if (!isxdigit(buf[j])) #endif { i = j; break; } } buf[i] = '\0'; /* * We have now cleared all the crap off the end of the line */ if (i < 2) goto err_sl; bufp = (unsigned char *)buf; k = 0; i -= again; if (i % 2 != 0) { ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_ODD_NUMBER_OF_CHARS); goto err; } i /= 2; if (num + i > slen) { if (s == NULL) sp = OPENSSL_malloc((unsigned int)num + i * 2); else sp = OPENSSL_realloc(s, (unsigned int)num + i * 2); if (sp == NULL) { ASN1err(ASN1_F_A2I_ASN1_STRING, ERR_R_MALLOC_FAILURE); if (s != NULL) OPENSSL_free(s); goto err; } s = sp; slen = num + i * 2; } for (j = 0; j < i; j++, k += 2) { for (n = 0; n < 2; n++) { m = bufp[k + n]; if ((m >= '0') && (m <= '9')) m -= '0'; else if ((m >= 'a') && (m <= 'f')) m = m - 'a' + 10; else if ((m >= 'A') && (m <= 'F')) m = m - 'A' + 10; else { ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_NON_HEX_CHARACTERS); goto err; } s[num + j] <<= 4; s[num + j] |= m; } } num += i; if (again) bufsize = BIO_gets(bp, buf, size); else break; } bs->length = num; bs->data = s; ret = 1; err: if (0) { err_sl: ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_SHORT_LINE); } return (ret); }